markets would be closed for two days in a row. did they underestimate things at first? how did that go down? >> don't think they underestimated it, but i think they rethought it and i think rethought it properly. new york is still the center of the stock trading universe. most people who are trading can't get in to trade, can't get in to participate, the question arises, who is there to trade in a thin market? i think with our concerns about market structure, market liquidity, market hot flashes and crazy flashes, flash crashes, et cetera, i think cooler heads prevailed and we have a closure. i think that was the right thing to do. >> brian bellski, what impact does this have? we do have electronic trading. we're in a period where people could trade from wherever they are. they don't are to be in a centralized location now. is it necessary to close trading when you get an event like this? >> well, i think just from the low guesstic standpoint, as the prior guest talked about, yeah, it does make sense to close.